John tbegoning



(No Model.)

J. TREGONING.

ELEGTRIGARG LAMP.

Patented Feb. 16, 1886.

UNITED STATES PATENT OFFICE.

JOHN TREGONIG, OF BROOKLYN, NEV YORK, ASSIGNOR TO THE SOHUYLER ELECTRIC LIGHT COMPANY OF NEXY YORK.

ELECTRIC-ARC LAMP.

SEECFICATION forming part: o Letters Patent No.336,1'6, dated February 16, 1886.

(No model.1

T ali whom t may concern:

Be it known that l, JOHN TEEGONING, a citizen of the United States, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improveinents in Electric-Arc Lamps, of which the following is a specification.

My invention ielates to electric are lamps, and is designed more especially to improve io the sensitiveness and certainty of action of the magnet system by which the carbon-adjusting or feed-controlling mechanism is operated.

My invention consists in a feed-regulating i5 magnet system composed of a main-circuit coil or helix, a movable core therefor connected to the feed mechanisnuand a high-resistance derived-circijiit coil wound upon an extension of said core exterior to the main circuit coil 2o or helix and carried by the core. In the operation of this system the maincircuit coil draws the core up within it to separate the carbons, while the derived-circuit coil, instead of exerting any positive pull upon the magnet system, simply coiinteracts the magnetism induced in the core by the main-circuit coil, so that gravity or a spring may pull the core down out of said coil and produce the feed.

In my system the derived-circuit coil can 3o under no circumstances exert a pull upon the core or armature, and my lamp is therefore free from the difficulty attaching to somelanips in which upon an abnormal arc the derivedcircuit coil may carry a current sufficient to 55 entirely overbalance the effects of the maincircuitJ coil, and may itself in addition exert a sufficient pull on the magnet system to keep the carbons apart when it should permit them to feed. This is a difficulty belonging to lamps .io in which the main and derived circuit coils are stationary and wound over one another upon the saine core, or in which the cores of the main and derived circuit helices move with relation to one another, as well as to other systems.

In my system, when no current or a very weak current passes in the main-circuit coils, the derived-circuit coils are powerless to produce any movement of the magnet system no 5o matter how strong a current they may carry,

and under no circumstances do they act posiA lively on the system.

Int-lie accompanyingdrawing, Ihave shown in elevation a lamp embodying my invention.

R indicates the usual carbon rod or carrier, and C a clutch, or any other suitable feed-regulating mechanism, that separates the carbons when moved in one direction and permits them to feed toward one another when moved in the opposite direction. Said clutch oi' clamp 6o is connected by a link, B, with the magnet system, and is raised and lowered by the latter to produce the desired movements of the rod R. The magnet system is herein shown as virtually duplicated; but one portion or side thereof may be dispensed with.

D D indicate main or principal circuit coils in the circuit of the cai-bons, asindicated, and E E movable cores therefor supported on opposite ends of a lever, F, pivoted on a link, 7o G, hung from the lamp frame or box. Upon magnetic extensions ofthe cores E E are wou nd the usual derived-circuit coils, II H, in a derived circuit of high resistance around the carbons. These coilsaresupportedbythecores and move with them, The link B moves with the magnet system through attachment to the head of a derived-circuit coil, as indicated.

K indicates a suitable dasli-pot, to check sudden movements of the magnet system. The 8o weight ofthe cores and other parts assisted, if need be, by a spring holds the mechanism normally in the position shown to permit the carbons to come together. In this position the coils H are evidently powerless to produce any effect of themselves upon the mechanism.

When current passes, the coils D act upon their cores, draw them within theircenters,and lift the carrier to form the arc. The current in the derived-circuit coils tends to neutralize 9o the magnetic condition of the cores, and thus determine the distance to which the magnet system shall lift the controlling mechanism. Vhen the arc lengthens abnormally, the effect of coils H increases, and the weight of the parts or a spring retracts the cores and produces a feed. If the arc become unduly attenuated, the current in coils D becomes unduly weak, and that in coils H very strong, but as the lifting power depends primarily on roo the coilsl), and the relation of the coils H to the cores never changes, since they move with them, the said coils H cannot exert a lifting action that would tend to keep the carbons separated, and the only effect can be to permit the weight or other retractor to perform its function of pulling the coins out of the main-circuit coils and allowing a release of the carbon.

Itis obvious that the coils and core to the left of the carrier in the drawing might be dispensed with.

What I claim as my invention is The combination, in an electric are lamp,

of a main-circuit coil or helix, a movable core i5' therefor, feed-regulating mechanism connected with said core, and a high-resistance derivedcircuit coil carried and wound upon a portion of the core extending outside of the main-circuit coil or helix, as and for the purpose dezo scribed. f,

Signed at New York, in the county of New York and State of New York, this 24th day of December, A. D. 1883.

JOHN TREGONING.

Witnesses: v

THos. TooMEY, LEONARD MoRsE. 

